Phosphorylation of the Myofibrillar Proteins

In muscle, protein phosphorylation takes place in both the sarcoplasm and the myofibrils. This review deals only with those myofibrillar proteins that can be phosphorylated-i.e. myosin light chain and in a few cases the heavy chain, the inhibitory and tropomyosin-binding subunits of troponin, and tropomyosin. Although research on this topic began as recently as 1972, several interesting results have been accumulated (for reviews, see 86-88, 114, 116).